2027409 - Perma browser/base/content/test/static/browser_parsable_css.js | checkAllTheCSS - Got error message for chrome://devtools/content/debugger/src/components/App.css: Unknown pseudo-class or pseudo-element ‘-webk when Gecko 151 switches to beta on 2026-05-01

Status: VERIFIED FIXED

(Core :: Layout: Scrolling and Overflow, defect)

Description

[agoloman]

Central-as-beta-simulation
 
How to run these simulations
 
Failure log

Comment 1

[Daniel Holbert [:dholbert]]

Presumably just needs an explicit pref flip for this test.

Comment 2

[Hiroyuki Ikezoe (:hiro)]

There's a real bug regressed by bug 1977511.

STR;

1. Make sure the default scrollbar style on your environment overlay style
2. Open DevTools and choose the debugger
3. Choose whatever the source file causing overflow

The scrollbars are non-overlay styles. That's clearly caused by these styles.

The styles were introduced in bug 1313961, I don't know why we added it, I guess we were aiming commonizing some stuff between other browser's devtools?

Anyways, I am going to remove the styles.

Comment 3

[Hiroyuki Ikezoe (:hiro)]

Attachment: Bug 2027409 - Remove ::-webkit-scrollbar and relevant styles from devtools' debugger. r?#devtools-reviewers

Comment 4

[Silaghi Andreea]

No more failures for this in today's beta simulation

Comment 5

[Daniel Holbert [:dholbert]]

Given that the issue in comment 0 and the bug summary is no longer a problem (per comment 4), it's probably worth spinning off comment 3 to another bug -- hiro, would you mind doing that? (just a stub bug "remove webkit-prefixed scrollbar CSS from devtools, which was previously inactive but is now potentially active")

(You can update the bug relationship directly in phabricator, once you've filed one.)

Comment 6

[Phabricator Automation]

Comment on attachment 9560349 [details]
Bug 2027409 - Remove ::-webkit-scrollbar and relevant styles from devtools' debugger. r?#devtools-reviewers

Revision D290760 was moved to bug 2027902. Setting attachment 9560349 [details] to obsolete.

Comment 7

[Hiroyuki Ikezoe (:hiro)]

Filed bug 2027902 and move the patch there. I still wonder why the test stated passing, that's a mystery.

Comment 8

[agoloman]

Hi, the wonder is that the patch in comment 3 was imported in the comment 4's beta simulation. What she meant was that the patch is working, not that there is no longer a problem. Today's beta sim.

Comment 9

[Hiroyuki Ikezoe (:hiro)]

That's good to hear. I landed the patch in bug 2027902 is now landing, it's in the autoland queue.

Comment 10

[Daniel Holbert [:dholbert]]

Ah, thanks for clarifying & sorry for my misunderstanding.

Comment 11

[Sandor Molnar[:smolnar]]

the patch that landed in Bug 2027902 is verified fixed in today's beta-simulation
will also close this bug.